CNG manufactures high-quality 6x4 reducing flexible couplings designed for connecting pipes of different diameters quickly, securely, and cost-effectively.
This grooved coupling allows a 6-inch pipe (DN150) to connect seamlessly with a 4-inch pipe (DN100)—ideal for system upgrades, retrofits, equipment replacements, or partial pipeline downsizing.
Built with reinforced rubber and stainless-steel clamps, our reducing flexible couplings deliver a dependable seal even in harsh industrial and outdoor conditions.
For engineers, contractors, distributors, and large-scale project buyers, CNG provides stable quality, competitive pricing, and fast delivery for bulk procurement.
Allows smooth transition between different pipe sizes while maintaining leak-free performance.
Temperature-resistant and corrosion-resistant
Suitable for water, wastewater, chemicals, oil-containing fluids (NBR)
Long service life in industrial environments
Provides strong circumferential sealing
Anti-rust and suitable for both indoor and outdoor installation
Optional heavy-duty clamp reinforcement available
Easy connection between:
PVC | HDPE | Cast Iron | Galvanized Steel | Stainless Steel | ABS | Copper | Concrete
Perfect for pipeline repair, partial replacement, or system modification.
No welding, no adhesives, no heat treatment.
Simply position the coupling and tighten the clamps—reducing labor time and project costs significantly.
Effectively compensates for:
Misalignment
Thermal expansion
Ground movement
Pump vibration
Ensures long-term sealing stability in dynamic piping systems.
| Item | Specification |
|---|---|
| Product | Reducing Flexible Coupling |
| Size | 6 inch × 4 inch (DN150 × DN100) |
| Rubber Material | EPDM / NBR |
| Clamp Material | SS304 / SS316 |
| Working Pressure | 6–10 bar (customizable) |
| Temperature Range | -20°C to +120°C |
| Standards | ASTM / EN / DIN / ISO available |
| Custom Options | Oil-resistant, high-temp, heavy-duty banding, OEM |
This reducing coupling is widely used in:
Municipal water & sewer systems
Drainage pipelines & building plumbing
Industrial fluid transfer
HVAC piping
Pump and equipment transitions
Mining and chemical plants
Pipeline maintenance, repair, and emergency replacement
Wherever pipe size transitions are required, CNG offers a reliable and durable solution.
10+ years manufacturing experience in pipeline connection components
Strict material inspection & pressure testing for every batch
Strong capability for OEM/ODM customization
Fast production cycles and stable supply capacity for bulk buyers
Export experience to North America, Europe, Middle East, and Southeast Asia
Highly competitive prices backed by factory-direct production
CNG helps contractors, distributors, and project owners reduce maintenance risks, improve installation efficiency, and achieve long-term pipeline reliability.
Looking for large-volume procurement or project-specific customization?
Contact CNG today for price lists, datasheets, and free samples (available for qualified buyers).
CNG – Reliable Solutions for Flexible Pipe Connections.
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